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##
## This file is part of the libsigrokdecode project.
##
## Copyright (C) 2014 Matt Ranostay <mranostay@gmail.com>
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, see <http://www.gnu.org/licenses/>.
##
import sigrokdecode as srd
class Decoder(srd.Decoder):
api_version = 3
id = 'rgb_led_spi'
name = 'RGB LED (SPI)'
longname = 'RGB LED string decoder (SPI)'
desc = 'RGB LED string protocol (RGB values clocked over SPI).'
license = 'gplv2+'
inputs = ['spi']
outputs = []
tags = ['Display']
annotations = (
('rgb', 'RGB value'),
)
def __init__(self):
self.reset()
def reset(self):
self.ss_cmd, self.es_cmd = 0, 0
self.mosi_bytes = []
def start(self):
self.out_ann = self.register(srd.OUTPUT_ANN)
def putx(self, data):
self.put(self.ss_cmd, self.es_cmd, self.out_ann, data)
def decode(self, ss, es, data):
ptype, mosi, miso = data
# Only care about data packets.
if ptype != 'DATA':
return
self.ss, self.es = ss, es
if len(self.mosi_bytes) == 0:
self.ss_cmd = ss
self.mosi_bytes.append(mosi)
# RGB value == 3 bytes
if len(self.mosi_bytes) != 3:
return
red, green, blue = self.mosi_bytes
rgb_value = int(red) << 16 | int(green) << 8 | int(blue)
self.es_cmd = es
self.putx([0, ['#%.6x' % rgb_value]])
self.mosi_bytes = []
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